CN112802724B - Electric connection box - Google Patents

Abstract

An electrical connection box, including: a housing with an opening and a side wall; a locking protruding plate; a cover with a hanging wall, the hanging wall having a lower end surface of the hanging wall and a hook; a locking part; and a cover disposed between the locking parts a rotating end portion of the body; an annular seal; a step portion; and a cutout portion provided on a hanging wall on a first portion of the cover body, the first portion including the rotating end portion. The cutout portion is formed by cutting the lower end of the hanging wall, so that the first gap between the lower end surface of the hanging wall and the step portion at the first portion is larger than the first gap between the lower end surface of the hanging wall and the step portion at the second portion of the cover body. a second gap that is different from the first part.

Description

Electrical connection box

Technical field

The present disclosure relates to an electrical connection box.

Background technique

A related art electrical connection box is installed on a vehicle to accommodate electronic components (for example, see JP2001-72116A). As shown in FIG. 9 , this type of electrical connection box 501 includes a cover 507 (upper housing) that is fitted into an opening 505 of a housing 503 (lower housing) housing electronic components (see FIG. 11 )middle. As shown in FIG. 10 , the cover 507 has substantially the same outer shape as the housing 503 in plan view. As shown in FIG. 11 , the cover 507 includes a hanging wall 511 covering the outside of the side wall 509 of the housing 503 . An annular seal 513 is installed on the inner periphery of the cover 507 . The upper end of the side wall 509 of the housing 503 serves as the seal abutting end surface 515 . When the cover 507 covers the housing 503 from above, a plurality of locking portions 517 provided on all sides of the housing 503 and the cover 507 between the housing 503 and the cover 507 are locked, so that the seal 513 resists The joint seal abuts the end surface 515 and elastically deforms. As a result, the electrical connection box 501 is watertightly sealed between the cover 507 and the opening 505 . The housing 503 includes a step 519 on the outer surface of the side wall 509 . The suspension wall lower end surface 521 is in contact with the step portion 519 without any gap C (C=0). As a result, water hardly enters the electrical connection box 501 from the gap between the outer surface of the side wall 509 and the suspension wall 511, which gap is located upstream of the seal 513 in the water inlet direction (i.e., the suspension walls abutting each other) The wall lower end surface 521 and the step portion 519 prevent water from entering before the seal 513 prevents water from entering the electrical connection box 501).

As another type of the electrical connection box 501, there is a rotation-fit electrical connection box in which the cover 507 is fitted to the housing 503 by rotating about a rotation axis 523 along one side of the cover 507. In the rotary fitting electrical connection box, unlike the vertical fitting electrical connection box in which the entire periphery of the seal 513 is pressed simultaneously (that is, unlike the electrical connection box in which the cover is vertically mounted to the housing), the seal 513 is moved from The rotating base side gradually contacts and is pressed toward the seal abutting end surface 515 . Therefore, the repulsive force of the seal 513 gradually increases toward the rotation tip side. As a result, when the rotating tip is pressed toward the housing 503 , the cover 507 may be deformed between the rotating base and the rotating tip due to the repulsive force of the seal 513 . When the cover body 507 is deformed, the lower end surface 521 of the suspension wall at the rotation end portion first contacts the step portion 519 and cannot be pressed further. In this state, due to deformation, it is more difficult to abut the step portion 519 on the rotation base side than to abut the step portion 519 on the rotation end portion. In this case, the locking portion 517 near the rotation end portion (for example, the upper and lower two locking portions 517 on the right side in FIG. 10 ) may not reach a position where the locking portion is reliably locked, and the cover body 507 may reach a semi-chimeric state.

Contents of the invention

An illustrative item of the present invention provides an electrical connection box configured to prevent half-fitting of a cover.

According to an illustrative item of the present invention, an electrical connection box includes: a housing having a polygon-shaped opening; and a plurality of side walls each having a seal abutting end face on an upper end; a locking protruding plate, The locking protruding plate protrudes from an outer surface of one of the plurality of side walls defining one side of the opening, the cover includes a hanging wall having a lower end surface of the hanging wall; and a hook having a frame shape, the cover being configured to be rotationally fitted to the housing; a pair of locking portions configured to secure the cover to the plurality of side walls and provided at two positions on each of the cover and the housing; The rotating end portion of the cover is arranged between the two positions. an annular seal configured to be installed on the inner circumferential side of the hanging wall; and a step portion formed on the outer surface of each of the plurality of side walls and configured to be installed when the cover body is attached to the case When the cover body is closed, it abuts the lower end surface of the hanging wall and the cutout portion on the hanging wall provided on the first part of the cover body, the first part including the rotating end portion. The hanging wall is configured to cover the outside of each of the plurality of side walls when the cover is mounted to the housing. The hook is provided on the hanging wall and configured to engage the locking protruding plate. The rotating shaft passes through a hook that engages the locking protruding plate. The cover is configured to rotate about the rotation axis to cover the opening, and the cover that is fitted to the housing is formed by cutting the lower end of the hanging wall when the cover is installed to the housing so that at the first portion The first gap between the lower end surface of the hanging wall and the step portion is greater than the second gap between the lower end surface of the hanging wall and the step portion at the second portion, and the second portion is different from the first portion.

Other objects and advantages of the invention will become apparent from the following description, drawings, and claims.

Description of the drawings

1 is a perspective view showing the appearance of an electrical connection box according to an embodiment of the present disclosure;

Figure 2 is a plan view of the electrical connection box shown in Figure 1;

3 is a perspective view of a main portion obtained by cutting a portion showing the rotating base of the cover body;

Figure 4 is a perspective view of the cover of Figure 1 viewed obliquely from below;

Figure 5 is a perspective view of the electrical connection box when the cover is in the middle of rotation and fitting;

Figure 6 is a rear view near the rotating end portion of the cover;

Figure 7 is a cross-sectional view taken along line B-B of Figure 2;

Figure 8 is a cross-sectional view taken along line C-C of Figure 2;

9 is a perspective view showing the appearance of a related art electrical connection box;

Figure 10 is a plan view of a prior art electrical connection box; and

FIG. 11 is a cross-sectional view taken along line A-A of FIG. 10 .

Detailed description

Hereinafter, embodiments according to the present disclosure will be described below with reference to the accompanying drawings. 1 is a perspective view showing the appearance of the electrical connection box 11 according to the embodiment of the present disclosure. The electrical connection box 11 according to the present embodiment is installed on a vehicle, for example, and is inserted between a power supply (secondary battery) (not shown) of the vehicle and electronic equipment to adjust power supplied from the power supply to the electronic equipment. The electrical connection box 11 may also be called a relay box, fuse box, junction box, etc.

The electrical connection box 11 according to the present embodiment includes a housing 13; a locking protruding plate 15 protruding from an outer surface of a side wall 29 of the housing 13; a cover 17; a pair of locking parts 19; a seal 21 installed on the cover 17; a step part 23 formed on the outer surface of the side wall 29; and a cutout part 25 formed on the outer surface of the side wall 29. on the hanging wall 55 of the cover 17.

The housing 13 is box-shaped with side walls 29 (also called frames) and includes a bottom cover 27 mounted on its lower portion. The upper end of the side wall 29 serves as a side defining an opening 31 (see Figures 2 and 5), which opens in a polygonal shape. The upper end of the side wall 29 serves as a seal abutting end surface 33 against which the seal 21 (see FIG. 3 ) installed on the cover 17 abuts. The case 13 and the bottom cover 27 are formed of insulating resin.

The housing 13 houses a plurality of electronic components (not shown). Electronic components housed in the housing 13 include, for example, relays, fuses or fusible links. Each electronic component includes an electronic component body (not shown) such as a relay body or a fuse body disposed inside the housing 13, and a plurality of terminals (not shown) as electrical connection portions electrically connected to the electronic component body. The terminals of the electronic components are electrically connected to wires (not shown). In this specification, electronic components, terminals, wires, etc. are collectively referred to as electronic components.

One end of the wire is connected to the terminal of the electronic component, and the other end is connected to a power source (secondary battery) or electronic device. The electric wire is led out of the casing 13 from the cylindrical electric wire insertion portion 35 formed on the casing 13 . The plurality of wires leading out from the housing 13 are bundled together by external members such as glue tape or corrugated tubes.

The side wall 29 of the housing 13 includes a cable connection 37 to which the power cord is connected. The cable connection part 37 includes a terminal connection part (not shown). The terminal installed to the end of the power cord is connected to the terminal connection part. The cable connection portion 37 has its upper and side portions covered by a protective wall 39 that is formed on the cover 17 and hangs down in parallel with the side wall 29 when the cover is mounted to the housing 13 . The cable connection portion 37 covered by the protective wall 39 leads out the power cord from below the protective wall 39 .

The housing 13 includes a plurality (two in this embodiment) of fixing brackets 41 protruding vertically from the side wall 29 . Each fixing bracket 41 has a bolt insertion hole 43 therethrough. The bolts inserted into the bolt insertion holes 43 will be fastened to the vehicle body panel, so that the electrical connection box 11 is fixed at a predetermined position in, for example, the engine room.

FIG. 2 is a plan view of the electrical connection box 11 in FIG. 1 . Here, the opening 31 of the housing 13 and the cover 17 have substantially similar shapes in plan view. In the present embodiment, the polygonal shape is a heptagon obtained by cutting one corner of the rectangle into a quadrilateral to form a recess and chamfering the corner newly formed by the cutting to form a hypotenuse. One of the seven sides of a heptagon is the hypotenuse, while the other sides are connected at right angles to the adjacent side. In addition, one corner of a polygon is an interior angle, and the other corners are exterior angles. The polygon is an example, and the shape of the electrical connection box 11 according to the present embodiment is not limited to the polygon.

FIG. 3 is a perspective view of a main part obtained by cutting out a part of the rotation base 45 of the cover body 17 . The locking protruding plate 15 projects from the outer surface of the side wall 29 along one side 47 of the opening 31 (see FIG. 2 ). In this embodiment, two locking protrusion plates 15 are provided spaced apart from each other in the direction along the side 47 . The locking protrusion plate 15 is formed in a rectangular shape having a long side along one side 47 . The locking protruding plate 15 has an inclined end surface 49 on its upper surface that is inclined downward toward the top end (ie, the end) of the protrusion. The inclined end surface 49 serves as a guide surface when the cover 17 is vertically fitted and mounted to the housing 13 . The lower surface of the locking protrusion plate 15 opposite the inclined end surface 49 serves as a flat locking surface 51 perpendicular to the side wall 29 . The hook 53 of the cover 17 is hooked (locked) on the locking surface 51 of the locking protruding plate 15 .

FIG. 4 is a perspective view of the cover 17 in FIG. 1 when viewed obliquely from below. The cover 17 includes a hanging wall 55 covering the outside of the side wall 29 . The hanging wall 55 is formed around the entire periphery of the cover 17 . In the cover 17 , when the cover 17 is mounted to the housing 13 , a frame-shaped hook 53 that engages the locking protruding plate 15 is formed on the hanging wall 55 along the side 47 of the opening 31 . The hook 53 is hooked by inserting the locking protruding plate 15 into the quadrilateral frame-shaped inner hole 59 . By hooking the hook 53 on the locking protruding plate 15 , the cover 17 locked on the housing 13 is restricted from moving upward (from the opening 31 ) and in a direction opposite to the protruding direction of the locking protruding plate 15 .

FIG. 5 is a perspective view of the electrical connection box 11 when the cover 17 is in the middle of rotational fitting. The cover 17 pivots around a hook 53 locked to the locking protruding plate 15 . The pivoting cover 17 covers the opening 31 and is rotatably fitted to the housing 13 . In the cover 17 , one side 57 of the cover 17 along the side 47 of the opening 31 serves as the rotation base 45 (that is, one side 57 is the side close to the rotation axis), and the other side 61 opposite to the one side 57 (see FIG. 2) Used as the rotation end portion 63 (that is, the side 61 is the side farthest from the rotation axis in the cover 17, or the second side). When the cover 17 is mounted to the housing 13 by rotational fitting, the rotation end portion 63 is pressed by the operator in the direction (arrow a) approaching the housing 13 (ie, the direction in which the cover is mounted to the housing 13). .

In the electrical connection box 11 according to the present embodiment, the length L from the side 57 serving as the rotation base 45 of the cover 17 to the rotation end portion 63 (see FIG. 2 ) is greater than the length W (see FIG. 2 ) of the side 57 . The length relationship between the length L and the length W of the electrical connection box 11 is not limited to this.

FIG. 6 is a rear view of the vicinity of the rotational end portion of the cover 17 . A pair of locking portions 19 are provided at two positions with the rotational end portion 63 of the cover 17 sandwiched therebetween. A pair of locking parts 19 is provided between the cover 17 and the housing 13 . The locking portion 19 includes a housing side lock 65 provided on the housing 13 and a cover side lock 67 provided on the cover 17 (that is, a pair of locking portions 19 are provided at two positions, between the cover 17 and the cover 17 ). Two locking parts 19 are provided on each of the bodies 13, and a rotating end part 63 of the cover 17 is provided between the two positions.

The housing side lock 65 includes a locking wall 65 a having a locking gap between the housing side lock 65 and the side wall 29 . The locking wall 65a includes a locking pawl (not shown) protruding into the locking gap.

The cover side lock 67 includes a lock plate 67a to be inserted into the lock gap (see Fig. 5). The locking plate 67a has a locking hole 67b on which the locking pawl is locked (see Figures 4 and 5).

Therefore, when the rotation end portion 63 of the cover 17 is pressed downward, the lock plate 67 a of the cover side lock 67 of each lock portion 19 is inserted into the locking gap of the case side lock 65 . When the rotating end portion 63 is further pressed downward, the locking hole 67b of the locking plate 67a is locked by the locking pawl of the locking wall 65a, thereby restricting the separation of the rotating end portion 63 from the housing 13. As a result, the cover 17 is fixed to the housing 13 through the pair of hooks 53 and the pair of locking parts 19 .

7 and 8 are cross-sectional views taken along lines B-B and C-C in FIG. 2 . The seal 21 is formed in an annular shape, is made of a linear body, has a quadrangular cross-section, and is made of an elastic material such as rubber. The seal 21 is installed on the inner peripheral side of the hanging wall 55 . The hanging wall 55 includes an inner wall 71 facing the hanging wall 55 on its inner side, and the inner wall 71 is formed with a seal receiving groove 69 opening toward the housing 13 (opening downward). The inner wall 71 hangs downward from the cover 17 parallel to the hanging wall 55 . The seal 21 is held over the hanging end (the end of the inner wall 71 ) of the inner wall 71 in a seal receiving groove 69 defined by the hanging wall 55 and the inner wall 71 . That is, the seal 21 is accommodated and held on the deep side (the upper side in FIG. 7 ) of the seal accommodating groove 69 .

When the cover 17 is installed on the housing 13 , the seal 21 abuts the seal abutting end surface 33 with a predetermined pressing force. The seal abutting end surface 33 is the upper end of the side wall 29 of the housing 13 . As a result, the elastically deformed seal 21 contacts the seal abutting end surface 33 in a pressing manner, and the space between the housing 13 and the cover 17 is sealed in a watertight manner.

As shown in FIG. 5 , a step portion 23 is formed on the entire periphery of the housing 13 on the outer surface of the side wall 29 . As shown in FIG. 8 , the step portion 23 has a plane perpendicular to the side wall 29 by forming a thicker portion on the outside of the side wall 29 . When the cover is installed to the housing 13, the hanging wall lower end surface 73 of the rotatably fitted cover 17 abuts this plane.

A cutout portion 25 is formed in the hanging wall 55 in the range K between the pair of locking portions 19 (structural addition range K or first portion) shown in FIG. 6 . As shown in FIG. 8 , the cutout portion 25 is configured such that the suspension wall lower end surface 73 is provided upward from the step portion 23 so that the gap C (first gap C) between the suspension wall lower end surface 73 and the step portion 23 is larger than Gaps (second gaps) in other parts (parts outside range K or second parts). The former gap C (first gap C) is set to, for example, 2.0 mm. As shown in FIG. 4 , the cutout portion 25 is arranged above the lower end surface 73 of the other portion of the suspension wall. The latter gap C (second gap C) may not exist in other parts (C=0). Even if the latter gap C (second gap C) exists in other parts, it is desirable that it is less than about 0.1 mm.

The electrical connection box 11 according to the present embodiment includes a hanging wall extension 75 provided on the hanging wall 55 in a range where the cutout portion 25 is provided. The hanging wall extension 75 protrudes from the lower end of the cutout portion 25 and hangs downward along the outside of the side wall 29 so that the hanging wall extension 75 covers the gap C from the outside. The hanging length b from the notch part 25 to the lower end of the hanging wall extension part 75 is set to approximately 5.0 mm.

In the electrical connection box 11 according to the present embodiment, the cover 17 is rotationally fitted to the housing 13 . In the rotational fitting, the cover 17 pivots around the hook 53 by engaging the hook 53 provided on the cover 17 with the locking protruding plate 15 provided on the side wall 29 along one side 47 of the housing 13 . That is, one side 57 of the cover 17 (the side 57 of the cover 17 along the side 47 of the opening 31 , or the first side) serves as the rotation base end 45 (rotation axis), and the other side 61 opposite to the side 57 Used as the rotating end portion 63. The hook 53 is provided on the hanging wall 55 formed on the outer periphery of the cover 17 . The hanging wall 55 covers the outside of the side wall 29 of the housing 13 . An annular seal 21 is attached to the inner peripheral side of the hanging wall 55 . When the cover 17 is rotationally fitted to the housing 13, the seal 21 abuts the seal abutting end face 33, which serves as the upper end of the side wall 29 in a watertight manner. As a result, the space between the cover 17 and the opening 31 of the housing 13 is sealed in a watertight manner.

The housing 13 includes a step portion 23 protruding from the outer surface of the periphery of the side wall 29 . The step portion 23 abuts the lower end surface 73 of the hanging wall of the cover 17 , which is rotatably fitted to the housing 13 , or faces the lower end surface 73 of the hanging wall with a relatively small gap (about 0.1 mm). The step portion 23 and the hanging wall lower end surface 73 are substantially in contact with each other, thereby preventing water from entering.

The cover 17 pivots about the hook 53 of the rotating base 45 that engages the locking protruding plate 15 . The seal 21 gradually contacts and is pressed against the seal abutting end face 33 from the rotating base 45 , and finally the rotating end portion 63 is pressed against the seal abutting end face 33 . Therefore, the repulsive force of the seal 21 gradually increases toward the rotation tip portion 63 . As a result, when the rotating tip portion 63 is pressed against the housing 13 , the cover 17 may be deformed between the rotating base portion 45 and the rotating tip portion 63 due to the repulsive force of the seal 21 . When the cover body 17 is deformed, the lower end surface 73 of the hanging wall of the rotation end portion 63 first contacts the step portion 23, making it impossible to press further. In this state, it may be more difficult for the hanging wall lower end surface 73 of the cover 17 to abut the step portion 23 on the rotation base side than to abut the step portion 23 on the rotation end portion 63 . In this case, the locking portion 19 near the rotation end portion may not reach a position where the locking portion is reliably locked, and the cover 17 may end up in a semi-fitted state with the housing (i.e., the cover 17 may not be completely Installed into housing 13).

In view of this, the cover body 17 includes a cutout portion 25 on the hanging wall 55 at the rotation end portion 63 . When the cover body is installed to the housing 13, the cutout portion 25 is configured so that the hanging wall lower end surface 73 is spaced apart from the step portion 23, so that the gap C between the hanging wall lower end surface 73 and the step portion 23 is larger than the gap of other parts. . Since the cover body 17 includes the cutout portion 25 , even if deformation occurs due to the repulsive force of the seal 21 , the hanging wall lower end surface 73 of the rotation end portion 63 does not first abut the step portion 23 . Compared with the case of the related art, by providing the gap C formed by the cutout portion 25, the cover 17 can be moved in the closing direction (the direction in which the cover 17 moves toward the housing 13 so that the cover 17 closes the opening of the housing 13 ) rotate a larger amount. That is, a reasonable pressing margin is ensured to complete the locking of the locking portion 19 separated from the housing 13 due to the deformation of the cover 17 . As a result, even when the electrical connection box 11 is rotationally fitted, half-fitting of the cover 17 is prevented.

In the electrical connection box 11 according to the present embodiment, since the cutout portion 25 is provided on the hanging wall 55 of the cover body 17, even when the cover body 17 is deformed due to the repulsive force of the seal 21, the hanging wall of the rotating end portion 63 The lower end surface 73 does not contact the step portion 23 first. As a result, the cover 17 can be rotated in the closing direction and further pressed by the amount of the gap C that exists due to the cutout portion 25 . Therefore, by rotating the rotation end portion 63 of the cover 17 by a larger amount in the closing direction, the locking portion 19 separated from the housing 13 due to the deformation of the cover 17 completes locking.

When the operator's pressing force is released after the locking portion 19 completes locking by pressing the cover 17 at the cutout portion 25 by a certain amount of gap C, due to the elastic repulsive force of the seal 21, the gap between the cutout portion 25 and the step portion A gap C is formed between 23. The gap C in the range where the cutout portion 25 is provided is larger than the gap at other portions.

In the electrical connection box 11 according to the present embodiment, the hanging wall extension portion 75 bent in a crank shape protrudes from the lower end of the cutout portion 25 and hangs downward along the outside of the side wall 29 . After the locking is completed, the hanging wall extension 75 covers the large gap C provided between the cutout portion 25 and the step portion 23 on the same surface as the outer surface of the hanging wall 55 . In the electrical connection box 11 according to the present embodiment, water is prevented from entering through the cutout portion 25 provided to prevent the half-fitting of the locking portion 19 .

In the electrical connection box 11 according to the present embodiment, the length L (first length) of the cover (17) from one side 57 (first side 57) serving as the rotating base 45 of the cover 17 to the rotating end portion 63 is greater than The length W (second length) of one side 57 used as the rotation base 45 of the cover 17 . One side 57 serving as the rotation base 45 of the cover 17 is provided with a hook 53 through which the rotation axis X is rotated. That is, the rotation radius of the cover 17 is larger than the length W of the side 57 serving as the rotation base 45 . In the case of such a cover 17 , when the rotation base 45 is used as a fulcrum and the rotation end portion 63 is pressed, the amount of deformation due to the elastic repulsive force of the seal 21 is larger than the rotation radius and smaller than the side 57 serving as the rotation base 45 The amount of deformation in the case of length. In addition, when the appearance of the cover 17 in a plan view is not linearly symmetrical with respect to a line segment orthogonal to the rotation axis X, the amount of deformation may become large near a specific one of the locking portions 19 .

In the electrical connection box 11 according to the present embodiment, even if such a large deformation occurs, the rotation end portion 63 of the cover 17 rotates a large amount in the closing direction, and therefore, the locking portion 19 can be reliably completed of lock. Therefore, in the electrical connection box 11 in which the length L from the side 57 serving as the rotating base 45 of the cover 17 to the rotating end portion 63 is greater than the length W of the side 57 serving as the rotating base 45 of the cover 17, or in the cover In the electrical connection box 11 in which the body 17 is not linearly symmetrical with respect to the line segment orthogonal to the rotation axis X, the effect of preventing half-fitting of the lock portion 19 can be more effectively exhibited.

Therefore, according to the electrical connection box 11 in this embodiment, half-fitting of the cover 17 can be prevented.

Although the present invention has been described with reference to certain exemplary embodiments of the invention, the scope of the invention is not limited to the above-described exemplary embodiments, and those skilled in the art will understand that without departing from the invention as defined by the appended claims range, within which various changes and modifications can be made.

According to an item of the above embodiment, the electrical connection box (11) includes a housing (13) having a polygon-shaped opening (31); and a plurality of side walls (29), each side wall at an upper end There is a seal abutting end face (33); a locking protruding plate (15) protruding from the outer surface of one of the plurality of side walls (29) defining the opening (31 ) side (47); a cover (17), which includes a hanging wall (55) with a lower end surface (73) of the hanging wall; and a frame-shaped hook (53), the cover (17) ) is configured to be rotatably fitted to the housing (13); a pair of locking parts (19) configured to fix the cover (17) to the plurality of side walls (29) and Disposed at two positions of each cover (17) and housing (13), the rotating end portion (63) of the cover (17) is disposed between the two positions; an annular seal (21), the annular seal the seal (21) is configured to be installed on the inner peripheral side of the hanging wall (55); a step portion (23) formed on the outer surface of each of the plurality of side walls (29), and It is configured such that when the cover (17) is installed to the housing (13), the step portion (23) abuts the lower end surface (73) of the hanging wall; and a cutout portion (25) is provided on the cover. On a suspended wall (55) on a first part of the body (17), which first part includes a rotating end portion (63). The hanging wall (55) is configured to cover the outside of each of the plurality of side walls (29) when the cover (17) is mounted to the housing (13). The hook (53) is provided on the hanging wall (55) and is configured to engage the locking protruding plate (15). The axis of rotation passes through a hook (53) that engages the locking protruding plate (15). The cover (17) is configured to rotate around the rotation axis to cover the opening (31) and is fitted to the housing (13). The cutout portion (25) is formed by cutting the lower end portion of the hanging wall (55) so that when the cover body (17) is installed to the housing (13), the lower end surface (73) of the hanging wall at the first portion is in contact with the lower end portion of the hanging wall (55). The first gap (C) between the step portions (23) is larger than the second gap (C) between the lower end surface (73) of the hanging wall and the step portion (23) at the second part of the cover body (17), The second part is different from the first part.

According to the electrical connection box having the above-described structure, the cover is rotatably fitted to the housing. In the rotation fitting, the hook provided on the cover body is engaged with the locking protruding plate provided on the side wall along one side of the housing, so that the cover body rotates around the hook. That is, one side of the cover (the side of the cover along the side of the opening) serves as the rotation base portion (ie, the rotation axis), and the other side opposite to this side (ie, the side of the rotation axis) serves as the rotation end portion (i.e., the part of the cover furthest away from the axis of rotation). The hook is provided on the hanging wall formed on the outer periphery of the cover body. The hanging wall covers the outside of the side wall of the housing. The annular seal is installed on the inner peripheral side of the hanging wall. When the cover body is rotationally fitted to the housing, the sealing member abuts in a watertight manner the sealing member abutting end surface serving as the upper end of the side wall. As a result, the space between the cover and the opening of the housing is sealed in a watertight manner. The housing includes a step protruding from an outer surface on an outer periphery of the side wall. When the cover rotates toward the housing, the step portion rotatably abuts the lower end surface of the hanging wall of the cover, or faces the lower end surface of the hanging wall with a relatively small gap. The step portion and the lower end surface of the hanging wall are generally in contact with each other, thereby preventing water from entering. Furthermore, the cover body includes a cutout portion on the hanging wall at a portion including the rotational end portion (first portion). The cutout portion is formed so that the lower end surface of the hanging wall is spaced apart from the step portion at the rotating end portion, so that the gap between the lower end surface of the hanging wall and the stepped portion is larger at the portion including the rotating end portion than at other portions (the second portion of the cover body). part) gap. Since the cover body includes the cutout, even if deformation occurs due to the repulsive force of the seal, the lower end surface of the hanging wall at the rotation end portion will not first come into contact with the step portion. Compared with the case of the prior art, due to the presence of the cutout portion, the cover body can rotate a larger amount in the closing direction. That is, even when the cover is rotated and pressed toward the case due to deformation of the cover, a sufficient pressing margin is ensured to complete locking of the locking portion that is easily separated from the case. As a result, even if the lid of the electrical connection box is rotated and connected, half-fitting of the lid can be prevented.

The electrical connection box (11) may further include a hanging wall extension (75) formed on the hanging wall (55) at the first portion, the hanging wall extension (75) extending from the cutout portion ( The lower end of 25) extends downward. The hanging wall extension (75) is configured to extend along the outside of the side wall (29) to cover the first gap (C) when the cover (17) is mounted to the housing (13).

According to the electrical connection box having the above-mentioned structure, when the operator's pressing force is released after the locking portion completes locking by pressing the lid body by the gap amount at the rotating end portion provided with the notch portion, due to the elastic repulsive force of the seal, A gap is formed between the cutout portion and the step portion. The gap at the rotation tip portion provided with the cutout portion is larger than the gap at other portions. In the electrical connection box having this configuration, the hanging wall extension portion bent in a crank shape extends from the lower end of the cutout portion and hangs downward along the outer side of the side wall. After the locking is completed, the hanging wall extension covers the large gap between the cutout portion and the step portion with the same surface as the outer surface of the hanging wall. As a result, in the electrical connection box having such a configuration, water is prevented from entering from the rotating tip portion provided with the cutout portion for preventing half-fitting of the lock portion.

In the electrical connection box (11), the first length (L) of the cover (17) from the first side (57) of the cover (17) to the rotating end portion (63) may be greater than the first length (L) of the cover (17). The second length (W) of the first side (57) used as the rotating base (45) of the cover (17).

In the electrical connection box having the above structure, the length of the cover from one side serving as the rotation base of the cover to the rotation end portion is greater than the length of one side serving as the rotation base of the cover. A hook serving as a rotation axis for rotation fitting is provided on one side of the rotation base serving as the cover. That is, the rotation radius of the cover is larger than the length of one side serving as the rotation base. In the case of this cover, when the rotating base is used as the rotating fulcrum and the rotating tip is pressed, the amount of deformation due to the elastic repulsive force of the seal is greater than in the case where the rotating radius is smaller than the length of one side used as the rotating base. The amount of deformation below. In addition, when the appearance of the cover body is not linearly symmetrical with respect to a line segment orthogonal to the rotation axis in plan view, deformation may be large near a specific one locking portion. In the electrical connection box having the above structure, even if such a large deformation occurs, since the rotational end portion of the cover is rotated in the closing direction and pressed a large amount, locking of the locking portion can be reliably completed. Therefore, in an electrical connection box in which the length of the cover from one side of the rotation base serving as the cover to the rotation end portion is longer than the length of one side of the rotation base serving as the cover, or the cover is positioned relative to an axis orthogonal to the rotation axis. In an electrical connection box in which the line segments are not linearly symmetrical, the effect of preventing half-fitting of the locking portion can be more effectively exerted.

In the electrical connection box (11), the rotation axis may extend along one side (47) of the opening (31).

In the electrical connection box (11), the rotating end portion (63) may be a second side (63) of the cover (17) opposite to the first side (57) of the cover (17). When the cover (17) is mounted to the housing (13), the first edge (57) may be along and near the axis of rotation.

In the electrical connection box (11), the first side (57) may be arranged closer to the axis of rotation than the second side (63).

In the electrical connection box (11), the hanging wall extension (75) may protrude outward in a direction orthogonal to the hanging wall (55), and the hanging wall extension (75) is bent so that when the cover (17) is installed When reaching the housing (13), the hanging wall extension (75) further extends downward along the outside of the side wall (29).

Claims (7)

1. An electrical connection box, including: A housing, which includes: a polygon-shaped opening; and a plurality of side walls, each of the above-mentioned side walls including a seal abutting end surface on an upper end; a locking protruding plate protruding from an outer surface of one of the plurality of side walls defining one side of the opening; A cover body, which includes: a hanging wall having a lower end surface of the hanging wall; and a hook having a frame shape, the above-mentioned cover body being configured to be rotatably fitted to the above-mentioned housing; A pair of locking parts, which fix the cover to the plurality of side walls and are provided at two positions of each of the cover and the housing, with a rotational end portion of the cover being provided at one of the two positions between; an annular seal configured to be installed on the inner peripheral side of the above-mentioned hanging wall; a step portion formed on the outer surface of each of the plurality of side walls and configured to abut the lower end surface of the hanging wall when the cover is installed to the housing; and a cutout portion provided on the hanging wall on the first portion of the cover body, the first portion including the rotating end portion, Wherein, the hanging wall is configured to cover the outside of each of the plurality of side walls when the cover is installed to the housing; wherein the above-mentioned hook is provided on the above-mentioned hanging wall and is configured to engage with the above-mentioned locking protruding plate, wherein the rotating shaft passes through the above-mentioned hook engaged with the above-mentioned locking protruding plate, wherein the cover is configured to rotate around the rotation axis to cover the opening and be fitted to the housing, and Wherein, the above-mentioned cutout part is formed by cutting the lower end of the above-mentioned suspension wall, so that when the above-mentioned cover is installed on the above-mentioned housing, the third gap between the lower end surface of the above-mentioned suspension wall and the above-mentioned step part at the above-mentioned first part A gap is larger than a second gap between the lower end surface of the hanging wall and the step portion at the second part of the cover, and the second part is different from the first part. 2. The electrical connection box according to claim 1, further comprising: A hanging wall extension is formed on the hanging wall at the first portion, the hanging wall extension extends downward from the lower end of the notch, and the hanging wall extension is configured to be mounted on the cover when the cover is attached to the notch. The housing extends along the outer side of the side wall to cover the first gap. 3. The electrical connection box according to claim 1 or 2, Wherein, the first length of the cover from the first side serving as the rotation base of the cover to the rotation end portion is greater than the second length of the first side of the cover. 4. The electrical connection box according to claim 1, Wherein, the above-mentioned rotation axis extends along the above-mentioned side of the above-mentioned opening. 5. The electrical connection box according to claim 1, Wherein, the rotation end portion is a second side of the cover opposite to the first side of the cover, and Wherein, when the cover is installed to the housing, the first side of the cover is along the rotation axis and near the rotation axis. 6. The electrical connection box according to claim 5, Wherein, the above-mentioned first side is arranged closer to the above-mentioned rotation axis than the above-mentioned second side. 7. The electrical connection box according to claim 2, Wherein, the above-mentioned hanging wall extension protrudes outward in a direction orthogonal to the above-mentioned hanging wall, and the above-mentioned hanging wall extension is bent, so that when the above-mentioned cover is installed on the above-mentioned housing, the above-mentioned hanging wall extension further extends along the above-mentioned The outer sides of the side walls extend downward.